Improvement in air-tight jars



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GEORGE M. EAMSAY; OE NEW YOEKQN. Y. Lette-rs Patent No. 71,215, elated llovemlm- 19, 1867.

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TO ALL WHOM IT MAY CONGERN:

Be it known tha-t I, GEORGE M. RAMSAY, of 'the city county, und State of New York,havein\ iented a'new v:tml improved Mode of Constructing Air-.Tight Jnrs.' v l j l The same principle, of interlocking the lid und making the jar tight, hel-ving been secured to me by Letters Patent, No. 54,015, no detailed description of this is therefore required. 'I

Like letters refer to likeparts in each figure. v i l svg/Lf Figure 1 represents t side viewlof the jnr, including the lid and rubber ring. I d represents the 4expunded base Of the lid', e the neck, mdf the'yubber ring, resting on the brim ofthe jar and under the cap of the lid.

Figureis vsame as fig. 1, except only the rubberf is made to rest'on the shoulder Of'thejur outside of the neck of the jur. i i A i Y l Figures 2 :ind-Ll'represent platu viewsof the inlet of jars. Figure 3 is a, plan View of the lid of lthe jur. I The'inew feature and mode consist of, and are limited to, the contraction of.the inlet 'of-tli'ejur'n-t more than two portionsor points, as represented by plan views, figs. 2 and 4,- wher'ein letter Arepresent-s, invdotted circles, the smaller cross-diameters, and B the larger crossdinvmetcrs vWhen more thenmone cross-section of the inlet is contracted, as represented in figs. 2 und 4, the lid, when twisted, is prevented'l'from gliding towardsthe longer diameters of the inlet, the dinmetcr of the neck c of the lid being made near thesnrne diameter of the dotted circles A in figs. 2'und 4, while thebnse d of the lid is made, :is represented ,by e, in plan `view, ,3, so :is to conform to the shape of the inlet of tbe' jar. l I i This mode of contract-ing the inlet of a jar is not the equivl'alent of lugs or projections', nor of u screw, either in sections or continuous, for the reason that my lid, when twisted either to the right or left, locks all the same. The principle upon which my lid locks arises from the'fact t lia.t,'in connection with the irregularshaped inlet, the inner surface of the inlet is made to incline in a piane towards the centre, and the outer surface of the bose of the lid is made to incline-in it plane from the centre; whereas the inclinations of lugs, and projections, and screws are necessarily made to incline, either onv the jar or on the lid, in a. plane coincident with the circumference of the lid or jar.

I claim contracting the inlet of jar at three or more portions of its cross-diameter, so as to hold the lid h near thecentre, substantially as and for the purpose herein set forth.

i GEORGE M. RAMSAY. Witnesses:

D. C. VAN COT'T, JOHN CURRIE. 

